Hope you use this to learn!
The original price I believe is $2.60
Answer:
-4.3375796178343949044585987261146
Step-by-step explanation:
you can probably round it off but that is what my calculator gave me.
The complete pattern is: 512, 256, 128, 64, 32, 16, 8, ( and extended ) 4, 2, 1!
I do this pattern in my head literally all the time!
(-5,2) concave up
Hope this helps :)